Combine the Jell-O with ½ cup boiling water and stir to dissolve. Add 1 ice cube and stir until the ice cube is melted. Let cool.
Combine the melted butter with the graham cracker crumbs and mix well. Divide the mixture evenly among the 6 jars and press down.
In a mixer fitted with the whisk attachment, beat the cream cheese with ½ cup powdered sugar and the vanilla until smooth. Add 1 cup cream and beat until stiff peaks form, scraping down the sides as needed.
Combine the Jell-O with 1/3 of the cream cheese mixture and refrigerate for 10 minutes to firm up slightly.
Divide half of the remaining cream cheese mixture evenly among the jars. Add the orange cream cheese mixture then top with the remining cream cheese mixture.
Beat the remaining ½ cup cream with 2 tablespoons powdered sugar until stiff peaks form. Layer the whipped cream on top. Refrigerate until ready to serve.
Before serving, garnish with two clementine segments and a sprig of mint.